An unforested rolling plain 荒野
a rolling plain 绵延起伏的平原
Rolling bearings and plain bearings 滚动轴承和滑动轴承
plain roller rolling 平辊轧制
plain strain rolling 平面应变轧制
Plain four high rolling mill 普通四辊轧机
Two million years ago, a cave-studded aquifer lay beneath an undulating plain of shallow, wooded valleys and rolling hills.
200万年前，在树木丛生的谷地和波状丘陵地带的起伏平原之下，是洞穴密布的地下蓄水层。
It may make quantitive account of skew ratio from plain roller rolling square bar.
此模型可对平辊轧制矩形件产生的脱方量进行定量计算。
The results show that nitrogen has remarkable influences on rolling contact fatigue life and plain strain fracture toughness, and little influences on wear resistance.
结果表明，含氮量对滚动接触疲劳寿命及平面应变断裂韧性具有很显著的影响，而对耐磨性影响很小。
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